• Medium format 1,436.6mm2
  • 51.4 megapixels
  • ISO 100 - 204,800
  • 35mm 847.3mm2
  • 24.2 megapixels
  • ISO 100 - 51,200

Buy From

Differences

Pentax 645Z advantages over Sony A9

  • Larger sensor
    Medium format vs 35mm
    More sensor area. Bigger is (generally) better.
  • Higher effective ISO
    4,505 vs 3,517 iso
    Take photos in low light with less noise
  • More dynamic range
    14.7 vs 13.3 evs
    Retain detail in highlight and shadows
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More pixels
    51.4 vs 24.2 megapixels
    Higher resolution photos
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos

Sony A9 advantages over Pentax 645Z

  • Lens selection
    Good vs Limited
    Better lens selection gives you more options
  • Less expensive
    $3498 vs $4997
    Save money for lenses or accessories
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    63 mm vs 123 mm
    Thinner
  • Higher max flash sync
    1/250 vs 1/125 sec
    Reduce the effect of ambient light in flash shots
  • Newer
    20 months vs 5 years old
    Newer cameras often support more advanced features
  • Lighter weight
    673g vs 1555g
    Lighter weight
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Faster JPEG shooting
    20.0 fps vs 3.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    364 vs 12 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    20.0 fps vs 3.1 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    240 vs 10 shots
    Larger buffer for RAW shots (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/32000 vs 1/4000 sec
    Shoot wide open in bright light

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Tiltable Screen
    Both provide
    Tilt the screen for shooting flexbility
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities
  • Dual card slots
    Both provide
    Gives you more storage flexibility
  • Bulb shutter
    Both provide
    Hold the shutter open manually for long exposures

Common Weaknesses

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash

User reviews

Buy From

Review Excerpt

  • Phenomenal resolution and detail; Great high ISO performance; Rugged, weather-sealed body; Huge, bright viewfinder; Fast autofocus works well in low light; Swift performance for a medium-format camera; Good battery life; Shoots Full HD video

  • Quite bulky compared to an APS-C or full-frame DSLR; Autofocus points clustered near center of frame; Most lenses aren't weather-sealed or optimized for digital; Prone to aliasing artifacts (but so are most high-end cameras these days); Attracts a lot of attention from passers-by

  • New sensor offers incredible performance; Excellent image quality at low & high ISOs; Very good dynamic range; Phenomenal 20fps burst speed & deep buffer; Very good battery life for a mirrorless; 4K video; Dual card slots.

  • Slow buffer clearing; Only one card slot is UHS-II compatible; Touchscreen underutilized; No lossless RAW compression option; No 4K/60p option.

The Competition

Compared to Pentax 645D

Pentax 645Z
Pentax 645D
  • $5665
  • Medium format
  • Focus peaking
  • Tiltable Screen
  • $3599
  • Medium format
  • Fast startup
  • Longer stills battery life
Sony A9
Pentax 645D
  • $3498
  • 35mm
  • Lens selection
  • Focus peaking
  • $3599
  • Medium format
  • Larger sensor
  • Fast startup

Compared to Leica S (Typ 007)

Pentax 645Z
Leica S (Typ 007)
  • $5665
  • Medium format
  • Less expensive
  • Tiltable Screen
  • $19995
  • Medium format
  • Shoot 4K video
  • Built-in Wi-Fi
Sony A9
Leica S (Typ 007)
  • $3498
  • 35mm
  • Lens selection
  • Less expensive
  • $19995
  • Medium format
  • Larger sensor
  • Built-in GPS

Compared to Leica S-E (Typ 006)

Pentax 645Z
Leica S-E (Typ 006)
  • $5665
  • Medium format
  • Focus peaking
  • Tiltable Screen
  • $16900
  • Medium format
  • Built-in GPS
  • Thinner
Sony A9
Leica S-E (Typ 006)
  • $3498
  • 35mm
  • Lens selection
  • Focus peaking
  • $16900
  • Medium format
  • Larger sensor
  • Built-in GPS

Compared to Leica SL (Typ 601)

Pentax 645Z
Leica SL (Typ 601)
  • $5665
  • Medium format
  • Less expensive
  • Larger sensor
  • $5995
  • 35mm
  • Shoot 4K video
  • Touchscreen
Sony A9
Leica SL (Typ 601)
  • $3498
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
  • $5995
  • 35mm
  • Built-in GPS
  • Top deck display

Compared to Sony A7 III

Pentax 645Z
Sony A7 III
  • $5665
  • Medium format
  • Larger sensor
  • Higher effective ISO
  • $1998
  • 35mm
  • Lens selection
  • Less expensive
Sony A9
Sony A7 III
  • $3498
  • 35mm
  • Fast startup
  • Faster JPEG shooting
  • $1998
  • 35mm
  • Less expensive
  • More dynamic range
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